Image Caption: Illustrates the FTP connection between a Client and a Server, using the PASV command. Credit: Michael Lorer/Wikipedia (CC BY-SA 3.0)
File transfer protocol (FTP) is the protocol of transferring files from one host to another host usually over the Internet. This protocol is normally done by authentication by the user entering a username and password. However, some servers (hosts) allow anonymous connection, which in most cases allows limited access to the site.
The first...

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An Internet Protocol address (IP address) is a numerical label assigned to a device that participates in a computer network that uses the internet for communication, such as a printer or computer. The IP address has two functions, network interface identification and location addressing. IP addresses have been defined as a 32-bit number system known as Internet Protocol Version 4 (IPv4) which is still in use today. But, with the limited availability of addresses, a...

A network is a group of computers and devices that are interconnected by communications channels. These channels facilitate communications among users and allow them to share resources. Many different characteristics can be used to classify a network.
There are several purposes for networks. One of the most common uses of a network is for communication purposes. With a network, people can communicate efficiently and easily through email, instant messaging, chat rooms, video telephone calls,...